Trex

: Adults could reach lengths of 40–42 feet and weigh up to 8–9 tons.

: Scientists originally thought T. rex matured in 20 years, but new bone analysis indicates they were slow growers, not reaching full size until 35 to 40 years old. : Adults could reach lengths of 40–42 feet

: While popularized with scaly skin, evidence of feathers on close relatives suggests they may have had patches of feathers , particularly as juveniles. Diet and Hunting Behavior : Adults could reach lengths of 40–42 feet